Journal of Fluorescence最新文献

{"title":"Systematic Computational Designing of Efficient Phenalene and Pyrene Based Derivatives to Tune the Optical and Nonlinear Optical Response.","authors":"Tazeem Fatima, Shamsa Bibi, Shabbir Muhammad, Shaukat Ali, Muhammad Yaseen","doi":"10.1007/s10895-025-04330-x","DOIUrl":"https://doi.org/10.1007/s10895-025-04330-x","url":null,"abstract":"<p><p>Nonlinear optical (NLO) materials are among the smartest materials of the present era and are employed to modulate the phase and frequency of the laser. The present study presents a quantum chemical framework for tailoring nitrogen/boron-doped (N/B) derivatives of phenalene and pyrene through the terminal and central core modifications to check their NLO properties. The derivatives of these compounds have been designed by introducing various π-conjugated connectors and N/B heteroatoms in the phenalene and pyrene rings. Density functional theory (DFT) methods are used to optimize the ground state molecular geometries of designed compounds, represented as Phe-1 to Phe-4 (phenalene derivatives) and Pyr-1 to Pyr-4 (pyrene derivatives) at the M06-2X/6-311G* level of theory. A systematic impact of structural modulations is established by comparing first linear polarizability (α) and second hyperpolarizability (γ). For linear polarizability, Phe-4 has shown the highest value for α_iso and α_aniso values, which are 114.7 × 10^-24 esu and 197.9 × 10^-24 esu, respectively. For the second hyperpolarizability (γ), among the designed compounds, Pyr-4 has achieved the highest γ amplitude of 1929.9 × 10^-36 esu owing to its unique molecular structural design and the presence of strong donor-acceptor groups. The origin of higher γ amplitudes is attributed to its lower energy electronic transition and higher oscillator strength. Further analysis of electronic parameters, such as electron density difference (EDD) maps, the density of states (DOS), electrostatic potentials, transition density matrix (TDM) analysis, and frontier molecular orbitals (FMOs) analysis, demonstrated the more effective intramolecular charge transfer (ICT), resulting in a good NLO response. The compounds were also analyzed for their potential in photovoltaic applications based on open circuit voltage values between 2.144 eV to 0.395 eV and light harvesting efficiency ranging from 0.486 eV to 0.989 eV. These findings suggest that the designed compounds can be suitable NLO materials and possess significant potential for photovoltaic applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144110615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Performance Ratiometric Fluorescence pH Sensor Based on HPTS-IP/TiO₂@THHM Sensing Film.","authors":"Yaning Xue, Jia Xiao, Baohua Yue, Liuming Yan","doi":"10.1007/s10895-025-04355-2","DOIUrl":"https://doi.org/10.1007/s10895-025-04355-2","url":null,"abstract":"<p><p>A high-performance ratiometric fluorescence pH sensor based on HPTS-IP/TiO₂@THHM pH sensing film which contains a pH sensing layer and a scattering layer was developed. The pH sensing layer and scattering layer were fabricated by embedding HPTS-IP hydrophobic ion pairs and TiO₂ in TEOS-HTES organic/inorganic hybrid matrix (THHM), respectively. The HPTS-IP hydrophobic ion pairs were excited using pulsed signals from two LEDs with emission peaks of 404 nm and 454 nm, respectively. The fluorescence intensity ratio ([Formula: see text]) was significantly correlated with pH and exhibited excellent performance within the pH range of 6.0 ~ 9.0. Based on fluorescence intensity, peak position, peak width and spectral shape characteristics, a support vector regression (SVR) model was established for predicting the pH value. The root mean square error (RMSE) of the validation dataset in leave-one-out cross-validation (LOOCV) method was 0.180 and the correlation coefficient (R) of the predicted pH versus experimental pH reached as high as 0.999. The sensor exhibited fast response with a response time of 27 s, excellent reproducibility, reversibility and stability.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144086342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Early Detection of Plant Diseases and their Management Using Quantum Dots: Status and Strategies.","authors":"Maddi Sandhya, Govindasamy Senthilraja, Eswaran Priyadharshini, Lingareddy Usha Rani, Rathinakumar Harideekshayini, Moorthy Nishanthi, Theerthagiri Anand, Kizhaeral Sevathapandian Subramanian","doi":"10.1007/s10895-025-04344-5","DOIUrl":"https://doi.org/10.1007/s10895-025-04344-5","url":null,"abstract":"<p><p>Quantum dots (QDs) are nanoscale semiconductor structures, typically measuring below 10 nm, that exhibit unique electro-optical properties, making them highly suitable for diverse applications in chemistry, pharmacy, and microbiology. Their semiconducting nature allows precise control over optical and electronic behaviours, leading to significant advancements in fluorescence-based studies. Over the past few decades, rapid developments in QD technology have resulted in luminescent materials that emit in the near-infrared region, further enhancing their utility in imaging and sensing applications. QDs possess several desirable characteristics, including high quantum efficiency, excellent biocompatibility, solubility, chemical inertness, stability, and resistance to photobleaching. These properties have expanded their potential in plant pathology, where they facilitate pathogen detection through bioimaging and biosensors. Additionally, QDs are instrumental in studying plant-pathogen interactions, enabling researchers to track the movement and behaviour of various organisms such as fungi, bacteria, and viruses. Their application in disease diagnosis and management continues to grow, promising improved strategies for monitoring and mitigating plant infections. This review provides an in-depth discussion on the fundamental properties of QDs, their synthesis techniques, and their evolving role in enhancing plant disease detection and management through innovative imaging and sensing technologies.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144086236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Imidazopyridine Based Fluorescent Turn-Off Sensor for Selective Recognition of Fe³⁺ Ions and its Application in Test Strips.","authors":"Akanksha Manhas, Sonakshi Sasan, Lalita Devi, Manu Sharma, Avtar Changotra, Pawan Kumar, Kamal K Kapoor","doi":"10.1007/s10895-025-04359-y","DOIUrl":"https://doi.org/10.1007/s10895-025-04359-y","url":null,"abstract":"<p><p>A series of 2-ethoxycarbonyl imidazopyridines have been synthesised and characterised by various spectroscopic techniques (¹H NMR, ¹³C NMR, FTIR and HRMS). Among these compounds, 3e was selected for metal sensing applications due to its favourable photophysical properties. 3e demonstrated high selectivity and sensitivity for detecting Fe³⁺ ions, even in the presence of other competing ions in a mixture of acetonitrile/water (1:9, v/v). It showed a turn-off fluorescence response with a fluorescence detection limit of 3.9 µM. The decrease in the fluorescence intensity of 3e is due to paramagnetic quenching resulting from its interaction with Fe³⁺ ions. Job's plot analysis indicated a 1:1 binding ratio between 3e and Fe³⁺. Density Functional Theory (DFT) calculations revealed a reduced HOMO-LUMO energy gap for the 3e-Fe³⁺ complex, suggesting successful complexation. The binding constant, calculated using the Benesi-Hildebrand equation, was determined to be 2.845 × 10³ M^-1, further confirming the strong interaction between 3e and Fe³⁺. Time-based studies revealed excellent photostability of 3e and its rapid response time for detecting Fe³⁺. Real-time detection of Fe³⁺ was successfully achieved using sensor-coated filter paper, demonstrating the practical utility of 3e for rapid assays in real samples.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144086345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative Design of Sustainable On-Off Fluorescence-Mode Technique for Facile Measurement of Brexpiprazole, a New Antipsychotic Therapy in Different Matrices; Content Uniformity Evaluation; Comprehensive Sustainability Profiling.","authors":"Badriah Saad Al-Farhan, Ahmed Abdulhafez Hamad","doi":"10.1007/s10895-025-04347-2","DOIUrl":"https://doi.org/10.1007/s10895-025-04347-2","url":null,"abstract":"<p><p>Recently, a new antipsychotic treatment called brexpiprazole (BPZ) has been used to treat schizophrenia and other forms of psychosis. A straightforward, sensitive, precise, and environmentally friendly spectrofluorimetric technique was developed to measure it by forming an ion-pair association complex with Eosin Y. The dye's intrinsic fluorescence recorded at λ_em = 540 nm (λ_ex was 302 nm), is reduced when an ion-pair complex develops. The approach's settings for generating the brexpiprazole-eosin dye association complex were adjusted in the concepts of analysis. In the Britton-Robinson neutralizing solution (pH 4.0), the reaction was conducted. In the 100-1500 ng mL^- 1 range, the dye's fluorescence emission intensity dropped linearly, and the correlation value was 0.9998. The values for the sensitivity (LOQ & LOD) limits were 83.4 and 27.5 ng mL^- 1. The ICH standards have been followed in the validation of the suggested approach. Moreover, content uniformity analysis was also successfully conducted with it. Finally, the established system's greenness was evaluated using several recent analytical tools: the Eco-Scale, the Analytical Greenness metric approach (AGREE), the National Environmental Method Index (NEMI), the Green Analytical Procedure Index (GAPI), and GSST (Green Solvents Selecting Tool). Also, the method's whiteness, as well as blueness, were evaluated using modern Red Green Blue 12 model (RGB12) and Blue Applicability Grade Index (BAGI) tools.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144077898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triphenylamine-Based Metal-Free Organic Dyes as Co-Sensitizers: Enhancing Dye-Sensitized Solar Cell Performance Through Innovative Molecular Design.","authors":"Samar E Mahmoud, Safa A Badawy, Ahmed A Fadda, Ehab Abdel-Latif, Mohamed R Elmorsy","doi":"10.1007/s10895-025-04340-9","DOIUrl":"https://doi.org/10.1007/s10895-025-04340-9","url":null,"abstract":"<p><p>A series of novel dye-based D-π-A-type metal-free organic dyes was prepared via the Wittig reaction. Dyes SAS-1-5 containing triphenylamine (TPA) as a strong electron donor was linked with an aryl ring as a π-conjugation spacer, cyanoacetamide, 2-(phenylsulfonyl)acetonitrile, and thiazolidine as the electron acceptors. Herein, we confirmed the chemical structures of the co-sensitized triphenylamine sensitizers using spectral analyses. In addition, their optical properties, electrochemical characteristics, and photovoltaic performances were estimated. Theoretical density functional theory (DFT) at the B3LYP/6-311G(d, p) level was used to elucidate the bridged effect on geometry. The SAS-1-5 sensitizers showed absorption bands in a dimethylformamide (DMF) solution in the range of (450-590 nm) which led to an obvious enhancement in the visible harvesting ability. To improve the efficiency of the DSSCs, SAS-1-5 dyes were co-sensitized with the standard dye N-719. The power conversion efficiencies (PCEs) of SAS-1-5 with N-719 ranged from 7.39 to 9.12%. By employing SAS-2 as a co-sensitizer, the DSSC system achieved an impressive 9.12% efficiency, which was 24% higher than that when using the N-719 ruthenium complex dye. Furthermore, all TPA-based co-sensitizers (SAS-1-5) demonstrated considerable promise for improving photovoltaic performance.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144078210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensor with Strong Solid Emission for Fluorescence Colormetric Detection of 1, 4-Dioxane in Water and Vapor Based on the Keto-Enol Isomerisation.","authors":"Jing Wang, Zi-Ao Zong, Shi-Fu Huang, Mohd Muddassir, Zhi-Yong Xing, Na-Na Li, Wen-Qiong Jiang","doi":"10.1007/s10895-025-04296-w","DOIUrl":"https://doi.org/10.1007/s10895-025-04296-w","url":null,"abstract":"<p><p>In this work, an easy prepared solid fluorescent sensor 3-(benzo[d]thiazol-2-yl)-1-hydroxy-4-oxo-3,4-dihydrophthalazine-6-carboxylic acid (BPCA) was designed and synthesized and the structure was proved by IR, UV-Vis, NMR, HRMS and elemental analysis, which displayed high selectivity and sensitivity for fluorescence colormetric from green to blue sensing 1, 4-dioxane in water, and the detection limit was obtained 0.009% and the stability constant was 7.4 × 10⁴ M. Also, sensor BPCA was applied for the real-time monitoring 1, 4-dioxane vapor with apparent fluorescent color change from green to blue. The mild and specific chemical interaction between sensor BPCA and 1, 4-dioxane molecule allowed the sensor as portable chips to respond 1, 4-dioxane vapor with good selectivity over other common VOCs at room temperature. Also, the sensing mechanism based on the 1, 4-dioxane-induced keto-enol tautomerization of the phthalazine moiety was found and supported by DFT calculations. This sensor could serve as the basis of gas analyzers for detecting 1, 4-dioxane in the environment.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144078119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and Antibacterial Studies of Silver Loaded TiO₂ Electrospun Nanofibers Against E. coli by Fluorescence Spectroscopy and Microscopy.","authors":"Bisma Khanam, Rafaqat Ali Khan, Shahzad Anwar, Hina Ali, Muhammad Zakria, Taj Muhammad Khan, A Rahman, Ahmad Adnan, Nida Ali Shan, Muhammad Raffi","doi":"10.1007/s10895-025-04332-9","DOIUrl":"https://doi.org/10.1007/s10895-025-04332-9","url":null,"abstract":"<p><p>In healthcare, bacterial infections always remain a critical challenge. In this study, pristine and Ag-TiO₂ nanofibers (NFs) with varying silver (Ag) concentration (2wt.%, 4wt.%, 6wt.% and 8wt.%) were prepared by electrospinning, followed by calcination at 500 °C for 3 h. Morphological characterization revealed the formation of one-dimensional NFs with mean diameter 83.06 to 25.80 nm, depending on the Ag loading. The antibacterial activities were investigated using conventional methods (well diffusion, colony forming units counting) and advanced techniques (Confocal laser scanning fluorescence microscopy, Scanning electron microscopy and Fluorescence spectroscopy). The results from antibacterial studies have revealed that sample with 8wt.% Ag-TiO₂ exhibited the most significant antibacterial effect as evidenced by marked reduction in CFUs, almost complete quenching of fluorescence emission intensity and perforated bacterial membranes and cellular debris.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144078120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Comprehensive Study on the Photophysical Properties and Solvatochromic Behavior of Fluorescent Oxazole for Deep Blue OLED Applications.","authors":"S Suresha, G M Shilpa, Q Mohsen, Amnah Mohammed Alsuhaibani, C Pandurangappa, Pavankumar Prabhala, M S Thippeswamy","doi":"10.1007/s10895-025-04337-4","DOIUrl":"https://doi.org/10.1007/s10895-025-04337-4","url":null,"abstract":"<p><p>In this study, the photophysical properties of deep blue fluorescent 5-phenyl-4-tosyloxazole (5POX) was investigated using both theoretical and experimental techniques. The absorption and fluorescence spectra of the fluorophore were recorded in various solvents. The Stokes shift exhibited bathochromic behavior due to a π→π* transition. Ground and excited state dipole moments were empirically obtained utilizing the solvatochromic shift technique and solvatochromic correlations, such as Lippert's, Bakhshiev's, Kawski-Chamma-Viallet's, and solvent polarity equations. The excited state dipole moment of the 5POX molecule is greater than the ground state dipole moment, indicating increased polarity in the excited state. Ground state dipole moments, Mullikan charges, HOMO-LUMO energies, and molecular electrostatic potential maps were also computed using ab initio calculations with Gaussian 09 W software. Additionally, GCRD parameters were estimated using theoretically obtained HOMO-LUMO energies, suggesting that the synthesized molecules possess high electrophilicity and chemical stability. Overall, the results suggest that 5POX may be suitable for application in deep blue OLEDs.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144077079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of Latent Fingerprints with Simple AIE-Active p-Phenylenediamine Schiff Bases.","authors":"Nikita Kush Durgi, Prasad Pralhad Pujar","doi":"10.1007/s10895-025-04339-2","DOIUrl":"https://doi.org/10.1007/s10895-025-04339-2","url":null,"abstract":"<p><p>Detection of latent fingerprints (LFPs) is pivotal in recognizing the individuals involved in the crime. To achieve this, many attempts have been made to obtain highly sensitive fluorophores with low adhesiveness; however, this remains a challenge. The present research explores the synthesis and application of aggregation-induced emission active phenylenediamine-based Schiff bases 3a and 3b for latent fingerprint detection. The Schiff base, exhibiting enhanced fluorescence upon aggregation, demonstrates remarkable sensitivity and selectivity towards latent fingerprints. The synthesized compounds offer a unique approach, capitalizing on the aggregation-induced enhanced emission phenomenon, providing clear and vivid visualization of latent fingerprints on various surfaces, including rubber, plastic, glass, metals, aluminum foil, and ceramics. A simple powder dusting method was utilized to visualize the latent fingerprints. This technique successfully produced high-resolution images, giving all the 1-3 levels of specifications of the developed fingerprints. The photostability of the synthesized molecule was also evaluated by checking the emission produced by the compounds after storing them for a longer period under ambient conditions. The AIE Active Phenylenediamine-based Schiff bases provide a simple tool to visualize LFPs. The CIE (x, y) coordinates for 3a and 3b were (0.416, 0.556) and (0.317, 0.452), respectively, indicating green-yellow emission under UV 365 nm illumination.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144077928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}